随着耕作制度、作物布局、种植方式的变革,玉米螟的为害习性也产生了相应的变化。由于春玉米种植面积愈来愈少,越冬代玉米螟有很大一部分转移到苹果园,为害已很普遍,并有上升趋势。浮来山镇有11个果园遭受其为害,虫果率有的达到11％,其中田家店子果园1996年有10吨苹果被蛀食。针对这种情况,从1995年开始,我们对其发生为害习性及防治进行了观察研究,现汇报如下。 With the farming system, crop layout, changes in planting methods, the damage habits of corn borer also produced a corresponding change. Due to less and less spring corn acreage, a large part of overwintering generation of corn borer transferred to the apple orchard, damage has been very common, and there is an upward trend. Floating to the town of 11 orchards suffered its damage, insect fruit rate reached 11%, of which Tianjiadian orchard in 1996, 10 tons of apples were eaten. In view of this situation, from 1995 onwards, we conducted a study of its occurrence and prevention and treatment of harmful effects, are reported below.